Forget the polar vortex — New Yorkers are coping this week with a heat dome turning the region into a sweaty mess.

Plan for at least a week of high temperatures capped off by the heat dome, a high-pressure system that traps hot air and humidity near the surface and which can cause stagnant, triple-digit temperatures.

“It will be oppressive,” said Kristina Pydynowski, a senior AccuWeather meteorologist.

Temps will hit 96 Monday — marking this summer’s first official heat wave, defined as three consecutive 90-plus degree days.

“It’s going to be a sticky day,” Pydynowski warned. “You’re going to be sweating as soon as you get outside.”

The heat dome descends on the city on Friday and will linger throughout the weekend. The blistering weather pattern could dissipate early next week.